Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0ca602d466dcc5…

MALICIOUS

PDF

68.9 KB Created: 2021-02-14 14:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 531b27e71039bbd9273982f5c486af4c SHA-1: ece6d471e443b9ffafca6010b608df63ea3decba SHA-256: ee0ca602d466dcc51d45535bf6abcfee5b9401789ae4a34468b8ec5cc8c7ca4e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wb?keyword=cardiopatia%20congenita%20neonatal%20pdf PDF link annotation
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/dcb0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_601617836b2cf.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/IbwOjdK/49404494672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_5fe9feec94986.pdfIn PDF document text
    • https://leneguvajetuse.weebly.com/uploads/1/3/1/3/131380977/panawesotuduxu.pdfIn PDF document text
    • https://juzasofudabin.weebly.com/uploads/1/3/0/7/130775050/xoxesetunuvore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_6000700965eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_5fd8df3f92678.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/ba3f37ed3e1.pdfIn PDF document text
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/c23b296ca6bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454161/normal_5ffbdbf4dff7b.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/Gjbhge5/2667730117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485568/normal_5fc74a5c82662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fec267d407d9.pdfIn PDF document text
    • http://gazzsheff.xyz/resonate_book39zxz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC9 5048 bytes
SHA-256: cf6df0626f64df5cb4b3d37c8766858870d3e1d34c9b193f06e90e83f3c2ff47
font_01_sfnt_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 11632 bytes
SHA-256: 568dfbc097803a2159e88bb76baefcef2094f09e1495575d75314f9da9171a95